Anion-Exchange Membrane (AMI-7001S) for Electrolysis and Electrodialysis, CEEAEMCMI7001S
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The AMI-7001S (also known as AXM-200S) is a strong-base anion exchange membrane (AEM) manufactured by Membranes International Inc. It is the direct counterpart to the CMI-7000S cation exchange membrane. It is a heterogeneous membrane, consisting of quaternary ammonium ion-exchange resin particles embedded in a polymer matrix and reinforced with a woven synthetic fabric for mechanical strength.
It is composed of polymer backbone of polystyrene cross-linked with divinylbenzene and functional group of Quaternary Ammonium. Due to its thickness and cost-efficiency, AMI-7001S is a staple in water treatment and bio-electrochemical research: (1) Electrodialysis (ED): Used for demineralizing water, salt recovery, and removing nitrates or sulfates from wastewater. (2) Microbial Fuel Cells (MFCs): Frequently used as the separator in MFCs to allow for anion transport while preventing oxygen crossover to the anaerobic anode. (3) Diffusion Dialysis: Used for the recovery of acids or bases from industrial waste streams (e.g., spent pickling liquors). (4) Desalination: Part of the membrane stack used to produce fresh water from brackish sources. (5) Electrodeionization (EDI): Used in the production of high-purity water for the pharmaceutical and semiconductor industries.
| Part Number | CEEAEMCMI7001S (C-EE-AEM-CMI7001S) |
| Ion Type | Anion (–NR₄⁺) |
| Reinforcement | None |
| Thickness (um) | 450 |
| Ion Exchange Capacity (meq/g) | ~1.3 |
| Area Resistance (Ω·cm² in NaCl) | <40 |
| Operating pH | 1-10 |
| Operating Temperature | up to 90 °C |
| Pre-treatment Required | Soaking 24h |
| Primary Applications | Electrolysis; Electrodialysis, Electrodeionization, Microbial Fuel Cells (MFCs) |
| Package Grade | 10cm*10cm/pcs/pack (other sheet size of 20cm*20cm, 30cm*30cm, 40cm*40cm also can be supplied upon request) |
Use Note:
(1) The CMI-7000S is shipped dry chloride form. It must be properly hydrated and "swollen" before use to prevent it from cracking or leaking inside your cell: (a) Hydration: Soak the membrane in a 5% NaCl solution at room temperature. (b) Duration: A minimum of 24 hours is recommended to ensure the polymer matrix is fully hydrated and the dimensions have stabilized. (c) Expansion: The membrane will expand as it absorbs water. Pre-soak before cutting to your final dimensions; otherwise, the membrane may buckle or wrinkle once installed.